Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5270d1a88aa90fe…

MALICIOUS

PDF

17.8 KB Created: 2019-05-03 05:31:21 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-14
MD5: 235394824bd12f06e386b8c2b3ff6e50 SHA-1: 9e0c3985f963f82b45e8be26b730acd4125f8732 SHA-256: c5270d1a88aa90fe60888d77e9b86003718c6124adb0bbd7d764368b961a89ec
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm. While the ML classifier flagged it as malicious, the specific URLs extracted were labeled as benign. The primary attack pattern appears to be the distribution of these links, potentially for SEO manipulation or to redirect users to malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cefasfese.4pu.com/3735737731730739/A-Savage-Thunder-Antietam-and-the-Bloody-Road-to-Freedom-by-Jim-Murphy.pdf In PDF document text
    • http://cefasfese.4pu.com/2735732734738738/Crossroads-of-Freedom-Antietam-The-Battle-that-Changed-the-Course-of-the-Civil-War-by-James-M-McPherson.pdfIn PDF document text
    • http://cefasfese.4pu.com/4737733737731/Savage-Thunder-Wyoming-2-by-Johanna-Lindsey.pdfIn PDF document text
    • http://cefasfese.4pu.com/9735734739739733/The-Savage-Series-Books-1-3-The-Pearl-Savage-The-Savage-Blood-and-The-Savage-Principle-by-Tamara-Rose-Blodgett.pdfIn PDF document text
    • http://cefasfese.4pu.com/4735737732738739/Thunder-Road-by-Rob-Inclan.pdfIn PDF document text
    • http://cefasfese.4pu.com/6734731733738733/Thunder-Road-by-Sont.pdfIn PDF document text
    • http://cefasfese.4pu.com/1734736736738735/Nowhere-But-Here-Thunder-Road-1-by-Katie-McGarry.pdfIn PDF document text
    • http://cefasfese.4pu.com/3734731736732733/Nowhere-But-Here-Thunder-Road-1-by-Katie-McGarry.pdfIn PDF document text
    • http://cefasfese.4pu.com/4739731733/Long-Way-Home-Thunder-Road-3-by-Katie-McGarry.pdfIn PDF document text
    • http://cefasfese.4pu.com/1736739734734732/Walk-the-Edge-Thunder-Road-2-by-Katie-McGarry.pdfIn PDF document text
    • http://cefasfese.4pu.com/1738735739735731/The-Ukimwi-Road-by-Dervla-Murphy.pdfIn PDF document text
    • http://cefasfese.4pu.com/1734738736731731/Savage-Road-Devil-Call-MC---Layne-amp-Shelby-1-by-Ana-W-Fawkes.pdfIn PDF document text
    • http://cefasfese.4pu.com/1731737735737738734/Long-Road-to-Freedom-by-Ginette-Spanier.pdfIn PDF document text
    • http://cefasfese.4pu.com/1737736731733/Refugee-Road-Freedom-Fighters-1-by-Nikki-Landis.pdfIn PDF document text
    • http://cefasfese.4pu.com/2730738739731730/Rebel-Buddha-On-the-Road-to-Freedom-by-Dzogchen-Ponlop.pdfIn PDF document text
    • http://cefasfese.4pu.com/7730732734731734/The-Road-to-Freedom-Cara-Gesit-Raih-Kebebasan-by-Absurditas-Malka.pdfIn PDF document text
    • http://cefasfese.4pu.com/1738735734733738/The-Ice-Road-An-Epic-Journey-from-the-Stalinist-Labor-Camps-to-Freedom-by-Stefan-Waydenfeld.pdfIn PDF document text
    • http://cefasfese.4pu.com/1738733733731739/Thunder-Thunder-An-Elephant-s-Journey-1-by-Erik-Daniel-Shein.pdfIn PDF document text
    • http://cefasfese.4pu.com/8736731734731/Turning-15-on-the-Road-to-Freedom-My-Story-of-the-Selma-Voting-Rights-March-by-Lynda-Blackmon-Lowery.pdfIn PDF document text
    • http://cefasfese.4pu.com/3739737737731739/Lord-of-Thunder-Thunder-1-by-Linda-Mooney.pdfIn PDF document text